Spa shell enclosure



FIG. 1 is a top front perspective view of a spa shell enclosure showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a cross sectional view of the design taken along 5—5 of FIG. 1; and,

FIG. 6 is a cross sectional view of the design taken along 6—6 of FIG. 1.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

I claim the ornamental design for a spa shell enclosure, as shown and described. 